The OpenGL extensions guide / Eric Lengyel. Lengyel, Eric. OpenGL. Computer graphics. Computer games Programming. T385 .L43 2003 006.6 21 LEO Includes indexes. Hingham, Mass. : Charles River Media, c2003. c2003. 2003 Text xiii, 670 p. ; http://www.loc.gov/catdir/toc/ecip042/2003008206.html eng Graphics series Charles River Media graphics.